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![Shuah Khan](/assets/img/avatar_default.png)
ARRAY_SIZE is defined in several selftests. Remove definitions from individual test files and include header file for the define instead. ARRAY_SIZE define is added in a separate patch to prepare for this change. Remove ARRAY_SIZE from timens tests and pickup the one defined in kselftest.h. Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
187 lines
4.1 KiB
C
187 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <errno.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include <string.h>
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#include "log.h"
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#include "timens.h"
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/*
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* Test shouldn't be run for a day, so add 10 days to child
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* time and check parent's time to be in the same day.
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*/
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#define DAY_IN_SEC (60*60*24)
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#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC)
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struct test_clock {
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clockid_t id;
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char *name;
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/*
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* off_id is -1 if a clock has own offset, or it contains an index
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* which contains a right offset of this clock.
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*/
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int off_id;
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time_t offset;
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};
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#define ct(clock, off_id) { clock, #clock, off_id }
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static struct test_clock clocks[] = {
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ct(CLOCK_BOOTTIME, -1),
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ct(CLOCK_BOOTTIME_ALARM, 1),
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ct(CLOCK_MONOTONIC, -1),
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ct(CLOCK_MONOTONIC_COARSE, 1),
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ct(CLOCK_MONOTONIC_RAW, 1),
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};
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#undef ct
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static int child_ns, parent_ns = -1;
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static int switch_ns(int fd)
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{
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if (setns(fd, CLONE_NEWTIME)) {
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pr_perror("setns()");
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return -1;
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}
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return 0;
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}
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static int init_namespaces(void)
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{
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char path[] = "/proc/self/ns/time_for_children";
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struct stat st1, st2;
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if (parent_ns == -1) {
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parent_ns = open(path, O_RDONLY);
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if (parent_ns <= 0)
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return pr_perror("Unable to open %s", path);
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}
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if (fstat(parent_ns, &st1))
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return pr_perror("Unable to stat the parent timens");
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if (unshare_timens())
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return -1;
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child_ns = open(path, O_RDONLY);
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if (child_ns <= 0)
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return pr_perror("Unable to open %s", path);
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if (fstat(child_ns, &st2))
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return pr_perror("Unable to stat the timens");
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if (st1.st_ino == st2.st_ino)
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return pr_perror("The same child_ns after CLONE_NEWTIME");
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return 0;
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}
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static int test_gettime(clockid_t clock_index, bool raw_syscall, time_t offset)
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{
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struct timespec child_ts_new, parent_ts_old, cur_ts;
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char *entry = raw_syscall ? "syscall" : "vdso";
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double precision = 0.0;
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if (check_skip(clocks[clock_index].id))
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return 0;
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switch (clocks[clock_index].id) {
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case CLOCK_MONOTONIC_COARSE:
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case CLOCK_MONOTONIC_RAW:
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precision = -2.0;
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break;
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}
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if (switch_ns(parent_ns))
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return pr_err("switch_ns(%d)", child_ns);
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if (_gettime(clocks[clock_index].id, &parent_ts_old, raw_syscall))
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return -1;
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child_ts_new.tv_nsec = parent_ts_old.tv_nsec;
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child_ts_new.tv_sec = parent_ts_old.tv_sec + offset;
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if (switch_ns(child_ns))
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return pr_err("switch_ns(%d)", child_ns);
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if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall))
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return -1;
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if (difftime(cur_ts.tv_sec, child_ts_new.tv_sec) < precision) {
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ksft_test_result_fail(
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"Child's %s (%s) time has not changed: %lu -> %lu [%lu]\n",
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clocks[clock_index].name, entry, parent_ts_old.tv_sec,
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child_ts_new.tv_sec, cur_ts.tv_sec);
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return -1;
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}
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if (switch_ns(parent_ns))
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return pr_err("switch_ns(%d)", parent_ns);
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if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall))
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return -1;
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if (difftime(cur_ts.tv_sec, parent_ts_old.tv_sec) > DAY_IN_SEC) {
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ksft_test_result_fail(
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"Parent's %s (%s) time has changed: %lu -> %lu [%lu]\n",
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clocks[clock_index].name, entry, parent_ts_old.tv_sec,
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child_ts_new.tv_sec, cur_ts.tv_sec);
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/* Let's play nice and put it closer to original */
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clock_settime(clocks[clock_index].id, &cur_ts);
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return -1;
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}
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ksft_test_result_pass("Passed for %s (%s)\n",
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clocks[clock_index].name, entry);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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unsigned int i;
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time_t offset;
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int ret = 0;
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nscheck();
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check_supported_timers();
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ksft_set_plan(ARRAY_SIZE(clocks) * 2);
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if (init_namespaces())
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return 1;
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/* Offsets have to be set before tasks enter the namespace. */
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for (i = 0; i < ARRAY_SIZE(clocks); i++) {
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if (clocks[i].off_id != -1)
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continue;
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offset = TEN_DAYS_IN_SEC + i * 1000;
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clocks[i].offset = offset;
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if (_settime(clocks[i].id, offset))
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return 1;
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}
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for (i = 0; i < ARRAY_SIZE(clocks); i++) {
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if (clocks[i].off_id != -1)
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offset = clocks[clocks[i].off_id].offset;
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else
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offset = clocks[i].offset;
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ret |= test_gettime(i, true, offset);
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ret |= test_gettime(i, false, offset);
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}
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if (ret)
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ksft_exit_fail();
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ksft_exit_pass();
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return !!ret;
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}
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